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04-13-15-R
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04-13-15-R
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4/13/2015 1:58:39 PM
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TCAAP Energy Integration Resiliency Framework <br />Energy Source Implementation <br /> <br /> <br /> 46 <br />companies with additional process or domestic hot water load would optimize the efficiency <br />of the CHP system. <br />3.3. Low-Temperature District Energy System <br />3.3.1. Introduction <br />The residential neighborhoods of TCAAP present a unique and highly visible opportunity to leverage <br />low-grade energy from the treated groundwater as an energy supply for the neighborhoods, <br />distributed via a low-temperature district energy system. The proposed system would utilize thermal <br />energy from the TCAAP Groundwater Treatment station described in section 1.5.4 by transferring <br />energy from the groundwater to the district energy system. The groundwater, which is consistently <br />~52o, can be used to transfer energy to and from the closed-loop distribution system to meet heating <br />and cooling demand in the buildings, while not affecting the quality of the treated groundwater. The <br />pumped groundwater is estimated to have 9.8 MMBtu of energy available. The Hill and Creek <br />neighborhoods are projected to demand 68% of this energy. Thus, an additional 3.1 MMBtu could be <br />available for utilization in other areas of TCAAP or AHATS. <br />3.3.2. System Description <br />The proposed energy system would require an energy transfer station to be constructed at, or near, <br />the current pumping location for the groundwater treatment station. This energy transfer station <br />would consist of a heat exchanger to separate the groundwater from the system water, pumps to <br />circulate the distribution loop, controls, metering, and piping. <br />The existing building that houses the groundwater treatment station was originally the domestic water <br />treatment plant for the TCAAP site during the ammunitions manufacturing period. This building was <br />decommissioned, as the groundwater treatment system is housed in a building addition, and is now <br />largely vacant. The facility is more than adequate to house the proposed energy transfer station. The <br />building is owned by the Army, and will remain in the custody of the Army until the groundwater <br />treatment operations cease. Given these conditions, there would need to be an agreement between <br />the district energy district energy business and the Army for the use of this building. <br />As noted in Section 1.5.3, the operations of the groundwater treatment system are anticipated to <br />continue for a minimum of 30 years. By the end of this period, an alternative energy source may need <br />to be identified should the groundwater pumping be discontinued or unavailable for energy transfer. <br />At that stage, there would be multiple technologies that could be incorporated: <br /> A separate field of geothermal heat exchange wells could be constructed in the vicinity of the <br />energy transfer station.
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